-| [[Preview]: Linux virtual machines should enable Azure Disk Encryption or EncryptionAtHost.](https://ms.portal.azure.com/#view/Microsoft_Azure_Security/GenericRecommendationDetailsBlade/assessmentKey/a40cc620-e72c-fdf4-c554-c6ca2cd705c0) | By default, a virtual machine's OS and data disks are encrypted-at-rest using platform-managed keys; temp disks and data caches aren't encrypted, and data isn't encrypted when flowing between compute and storage resources. Use Azure Disk Encryption or EncryptionAtHost to encrypt all this data. Visit [https://aka.ms/diskencryptioncomparison](https://aka.ms/diskencryptioncomparison) to compare encryption offerings. This policy requires two prerequisites to be deployed to the policy assignment scope. For details, visit [https://aka.ms/gcpol](https://aka.ms/gcpol). <br />(No related policy) | High |
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